CN106556306B - Gray code band intelligent measuring tape capable of measuring distance in infrared mode and height measuring method - Google Patents

Abstract

The invention discloses an intelligent measuring tape with a Gray code belt and a method for measuring body height, wherein an infrared distance measuring module is arranged in the intelligent measuring tape body, can measure the distance exceeding the length of the measuring tape belt and display the distance on a display screen on the intelligent measuring tape, and the infrared distance measuring function is effectively integrated on the intelligent measuring tape.

Description

A gray code belt intelligent tape measure capable of infrared ranging and height measuring method

technical field

The invention relates to the technical field of intelligent tape measures, in particular to an intelligent gray code tape measure capable of infrared ranging and a height measuring method.

Background technique

Gray code belongs to reliability coding and is an error-minimizing coding method . Because, although the natural binary code can be directly converted into an analog signal by a digital-to-analog converter, in some cases, such as converting from decimal 3 to 4, every bit of the binary code must be changed, which can make the digital circuit produce very Large spike current pulses. The Gray code does not have this disadvantage. When it is converted between adjacent bits, only one bit changes. It greatly reduces the confusion of logic when going from one state to the next. Since there is only one bit difference between the two adjacent code groups of this encoding, in the conversion of the linear displacement amount for the direction to the digital amount, when the linear displacement amount changes slightly (and may cause the digital amount to change) , the Gray code only changes one bit, which is more reliable than the situation where other codes change two or more bits at the same time, which can reduce the possibility of errors.

In the prior art, gray code disks are mostly used for detection or counting. When the encoder or the brush device reads the gray code disk, the phenomenon of brush skipping or brush leakage often occurs, that is, because the speed of the brush device is too fast, the brushes appear. The device bounces over a certain Gray code, resulting in a wrong count, which is not conducive to the use of the Gray code. At the same time, arranging the Gray code disc in the smart tape measure body occupies a large internal space, making the device larger. Moreover, in the prior art, there is no tape measure capable of measuring infrared distances.

Therefore, the existing technology still needs to be improved and developed.

SUMMARY OF THE INVENTION

In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a Gray code tape intelligent tape measure capable of infrared ranging and a height measuring method, aiming to solve the problem that the intelligent tape measure in the prior art has no infrared ranging function, and the function is relatively simple. defect.

The technical scheme of the present invention is as follows:

A Gray code tape intelligent tape measure capable of infrared ranging, comprising a smart tape measure body, and a tape measure tape which is arranged in the smart tape measure body and can be drawn out, and at least one Gray code is provided on the front and back of the tape measure tape The gray code in the gray code channel is repeatedly set according to a specified period; the intelligent tape measure body is also provided with an infrared transceiver device corresponding to the gray code channel one-to-one and used for reading the gray code in the gray code channel; the intelligent tape measure The body is also provided with an MCU control chip; the smart tape measure body is also provided with a switch button for switching the measurement mode of the smart tape measure between the measurement mode of the tape measure being pulled vertically upwards and the measurement mode of the tape measure being pulled vertically downwards. The smart tape measure body is also provided with an infrared ranging module which is controlled by a switch to be turned on or off; the MCU control chip is electrically connected to the switch button, the infrared ranging module and the infrared transceiver device.

The smart tape measure with Gray code capable of infrared ranging, wherein the smart tape measure body is further provided with a switch device for controlling the opening or closing of the infrared transceiver device, and the switch device is electrically connected with the infrared transceiver device .

In the gray code tape intelligent tape measure capable of infrared ranging, the front and back surfaces of the tape measure tape are provided with three gray code channels from bottom to top.

The gray code tape intelligent tape measure capable of infrared ranging, wherein, the front of the tape measure tape is provided with low three gray code channels, which are respectively the first gray code channel, the second gray code channel and the third gray code road.

The gray code tape smart tape measure capable of infrared ranging, wherein, the side of the smart tape measure body facing the front of the tape measure tape is provided with three infrared transceivers, which are a first infrared transceiver and a second infrared transceiver. and a third infrared transceiver; wherein, the first infrared transceiver is facing the first Gray code channel, the second infrared transceiver device is facing the second Gray code channel, and the third infrared transceiver is facing the first Gray code channel. The transceiver device is facing the third Gray code channel.

The gray code tape intelligent tape measure capable of infrared ranging, wherein, the back of the tape measure tape is provided with three high gray code channels, which are the fourth gray code channel, the fifth gray code channel, and the sixth gray code channel. .

The gray code tape smart tape measure capable of infrared ranging, wherein, the side of the smart tape measure body facing the back of the tape measure tape is provided with three infrared transceivers, which are a fourth infrared transceiver and a fifth infrared transceiver. and a sixth infrared transceiver; wherein, the fourth infrared transceiver is facing the fourth Gray code channel, the fifth infrared transceiver is facing the fifth Gray code channel, and the sixth infrared transceiver is facing the fifth Gray code channel. The transceiver device is facing the sixth Gray code channel.

A gray code height measuring method with a smart tape measure capable of infrared ranging, comprising the following steps:

A. When it is detected that the infrared ranging device of the smart tape measure is turned on, the height reading of the fixed point of the smart tape measure from the ground is obtained through the infrared ranging device, and it is detected whether the tape measure is pulled out;

B. When it is detected that the tape measure tape is pulled out from the smart tape measure through the tape measure tape outlet, the number of repetitions of the Gray code with the specified period on the tape measure tape is obtained in real time through the infrared transceiver device, and it is judged whether the tape measure tape is stationary;

C. When judging that the tape measure is stationary, then obtain the binary number corresponding to the Gray code aligned by the infrared transceiver, and obtain the distance that the tape measure moves in the current cycle of the Gray code according to the Gray code table;

D. Obtain the length reading of the current measurement length according to the total width of the Gray code in each cycle, the number of repetitions of the Gray code and the distance moved in the current cycle of the Gray code;

E. When the current measurement mode of the smart tape measure is the measurement mode of the tape measure tape being pulled down vertically, the height is obtained by the difference between the height reading and the length reading;

F. When the current measurement mode of the smart tape measure is the measurement mode of the tape measure tape being pulled vertically upwards, the height is obtained by the length of the smart tape measure body, the height reading and the sum of the length readings.

Beneficial effects: the gray code tape intelligent tape measure and height measuring method with infrared ranging according to the present invention, an infrared ranging module is also arranged in the smart tape measure body, which can measure the distance exceeding the length of the tape measure tape, and can measure the distance on the smart tape measure. It is displayed on the display screen, and the infrared ranging function is effectively integrated on the smart tape measure.

Description of drawings

FIG. 1 is a schematic structural diagram of a preferred embodiment of the gray code tape smart tape measure capable of infrared ranging according to the present invention.

FIG. 2 is an exploded view of a preferred embodiment of the gray code tape smart tape measure capable of infrared ranging according to the present invention.

FIG. 3 is a schematic diagram of the front side of the tape measure in the preferred embodiment of the Gray code tape smart tape measure capable of infrared ranging according to the present invention.

FIG. 4 is a schematic diagram of the back side of the tape measure in a preferred embodiment of the gray code tape smart tape measure capable of infrared ranging according to the present invention.

FIG. 5 is a flow chart of a preferred embodiment of the method for measuring the height of the gray code with a smart tape measure capable of infrared ranging according to the present invention.

Detailed ways

The present invention provides a Gray code tape intelligent tape measure capable of infrared distance measurement and a height measuring method. In order to make the purpose, technical solution and effect of the present invention clearer and clearer, the present invention is further described below in detail. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

Please refer to FIG. 1 to FIG. 2 at the same time, wherein FIG. 1 is a schematic structural diagram of a preferred embodiment of the gray code tape intelligent tape measure capable of infrared ranging according to the present invention, and FIG. 2 is the gray code tape capable of infrared ranging according to the present invention. An exploded view of a preferred embodiment of a smart tape measure, the gray code capable of infrared distance measurement with a smart tape measure includes a smart tape measure body 100, and a tape measure tape 200 that is arranged in the smart tape measure body 100 and can be pulled out, the tape measure Both the front and the back of the tape 200 are provided with at least one Gray code channel, and the Gray code in the Gray code channel is repeatedly set according to a specified period; An infrared transceiver 300 for Gray code in the code channel; the smart tape measure body 100 is also provided with an MCU control chip; the smart tape measure body 100 is also provided with a measurement mode that pulls the measurement mode of the smart tape measure vertically upward on the tape measure tape and the tape measure tape vertically and downwardly pull out the switch button 130 for switching in the measurement mode, the smart tape measure body is also provided with an infrared ranging module 120 which is switched on or off by switch control; the MCU control chip and the switch button 130, The infrared ranging module 120 and the infrared transceiver 300 are both electrically connected.

When fixing the tape measure body 100 for height measurement, the smart tape measure body 100 is fixed vertically. At this time, the tape measure tape outlet 110 on the smart tape measure body 100 may be located at the top of the smart tape measure body 100 (this When the tape measure tape 200 is drawn upward), it may also be located at the lowest end of the smart tape measure body 100 (the tape measure tape 200 is drawn downward at this time).

When the tape measure tape outlet 110 is located at the top of the smart tape measure body 100 , the infrared ranging module 120 can be arranged at the bottom end of the smart tape measure body 100 (ie, with the tape measure tape outlet 110 relative to the axis-symmetric center of the smart tape measure body 100 . The other side of the line symmetry), this tape measure tape is pulled out vertically and the measurement mode is suitable for fixing the smart tape measure at a height of 1 meter above the ground, and pulling up the tape measure tape 200 to measure the height. In this way, the infrared ranging module 120 emits infrared rays toward the ground to measure the distance to obtain the infrared ranging distance; then pull out the tape measure tape 200 to a height that is flush with the top of the human head, and obtain the tape measure tape 200 through the infrared transceiver 300 and the MCU control chip. The length of the pulled out; finally, the distance from the top to the bottom of the smart tape measure body 100 (that is, the length of the smart tape measure body 100 ) is added, and the length of the tape measure tape 200 pulled out is added by the infrared ranging distance and the smart tape measure body is added. 100 The distance from the top to the bottom, summed to get the height of the user.

When the tape measure outlet 110 is located at the bottom end of the smart tape measure body 100, the infrared ranging module 120 can be arranged at the bottom end of the smart tape measure body 100 (ie, at the same position as the tape measure tape outlet 110). The vertical and downward pull-out measurement mode is suitable for fixing the smart tape measure at a height of 2 meters from the ground, and pulling out the tape measure tape 200 to measure the height. The sample infrared ranging module 120 emits infrared rays toward the ground to measure the distance to obtain the infrared ranging distance; then pull out the measuring tape 200 to a height that is flush with the top of the human head, and obtain the measuring tape 200 through the infrared transceiver 300 and the MCU control chip. Pulled out length; finally subtract the pulled out length of the tape measure tape 200 from the infrared ranging distance, and calculate the difference to get the height of the user.

It can be seen that the height measurement can also be performed by fixing the smart tape measure at a specified height, and there is no need to use a bulky professional height measuring instrument to measure the height as in the prior art, which is convenient for the user. At the same time, when the smart tape measure is not used for height measurement, the measuring tape 200 may not be pulled out, and the infrared distance measuring module 120 may be directly used to measure the distance. For example, the user can measure the distance to the obstacle in front.

During specific implementation, the smart tape measure body 100 is also provided with a display screen for displaying the real-time reading and status of the smart tape measure; A wireless transceiver module for the terminal to send data; the smart tape measure body 100 is also provided with a power supply for power supply. More specifically, the display screen is an E-ink display screen, a TN display screen, an STN display screen or a TFT display screen; the wireless transceiver module is a Bluetooth module.

Further, as shown in FIG. 2 , the smart tape measure body 100 is further provided with a switch device for controlling the infrared transceiver device to be turned on or off, and the switch device is electrically connected to the infrared transceiver device 300 . The switch device includes a code disc disposed on the PCB board 400 in the smart tape measure body 100 and a brush 410 in contact with the code disc. When the tape measure tape 200 is pulled, it drives the brush 410 to rotate. When the brush 410 rotates, it continuously contacts different contact pieces in the code disc, and generates a pulse (ie, a switch trigger signal), at this time, the infrared transceiver 300 is turned on. Take a reading of the Gray code on the tape 200. When the brush 410 has stopped rotating, the infrared transceiver 300 enters a standby power saving state or enters an off state. In this way, the infrared reading device is not turned on all the time, but is turned on under the control of the switching device, which effectively saves power.

During specific implementation, the infrared transceiver device 300 includes an infrared transmitting module and an infrared receiving module, the infrared transmitting module is connected to the infrared receiving module, and the infrared receiving module is connected to the MCU control chip in the smart tape measure. The voice broadcast device 120 is also connected to the MCU control chip, and broadcasts the length measurement result obtained by the MCU control chip.

Further, as shown in FIG. 3 and FIG. 4 , at least one linear Gray code channel 210 is disposed on both the front and back sides of the tape measure tape 200 , and a plurality of counting Gray codes are disposed on the Gray code channel 210 . During specific implementation, as shown in FIGS. 1 and 2 , the smart tape measure body 100 is provided with a tape measure tape outlet 110 , and a position close to the tape measure tape outlet 110 in the smart tape measure body 100 is provided with a gray code channel 210 corresponds to the infrared transceiver device 300 one-to-one.

Since all the Gray code channels 210 are arranged on the same side of the tape measure tape 200, the width of the tape measure tape 200 will be increased, that is, the height of the tape measure tape outlet 110 will be increased, that is, the thickness of the smart tape measure body 100 will be increased, thereby increasing the overall The volume of the smart tape measure is inconvenient for users to carry.

If the Gray code channel 210 is arranged on both sides of the tape measure tape 200, the width of the tape measure tape 200 can be reduced, which is beneficial to reduce the volume of the smart tape measure and is convenient for the user to carry.

For example, when a total of 6 Gray code channels 210 are arranged on the tape measure 200, N Gray code channels (where 1≤N≤6, and N is a positive integer) can be arranged on the front side, and (6-N) can be arranged on the back side. Gray code. Since the height of each Gray code channel 210 is the same and a fixed value, the sum of the heights of the Gray code channels 210 on the same side of the tape measure 200 is equal to the width of the tape measure tape 200. Therefore, when the number of gray code channels 210 on the front side of the tape measure tape 200 is equal to the width of the tape measure tape 200 When the number differs from the number of the Gray code channels 210 on the back of the tape measure 200 by one or is completely equal, the width of the tape measure tape 200 can be reduced to a minimum value.

Preferably, as shown in FIG. 3 and FIG. 4 , the front and back of the tape measure 200 are provided with three Gray code channels 210 from bottom to top; The first gray code channel 211 , the second gray code channel 212 and the third gray code channel 213 The five-digit Gray-coded channel 215 and the sixth-digit Gray-coded channel 216 .

In specific implementation, as shown in FIG. 3 , the first gray code channel 211 is provided with the first gray code channel black code and the first gray code channel white code that alternately appear in black and white. The maximum width of the black code of the bit Gray code channel is 2mm. As shown in FIG. 4 , the fourth gray code channel 214 is provided with a fourth gray code channel black code and a fourth gray code channel white code that alternately appear in black and white, and the fourth gray code channel black code The maximum width of the yard is 16mm. When the maximum width of the black code of the first gray code track is set to 2 mm, each length period of the sixth gray code channel 216 is 64 mm (that is, the black code appears only once in the same cycle, and only One time white code), that is, the repetition period L _T of the 6-digit Gray code set in the tape measure tape 200 is 64mm. Similarly, when the maximum width of the black code of the first gray code channel is set to 4 mm, the repetition period L _T of the 6-digit Gray code is 128 mm. Since 6 Gray code tracks are set on the tape measure tape 200 and the repetition period L _T of the 6-digit Gray code is 64 mm, it is already sufficient for the user to extract the tape measure tape 200 at various speeds without causing infrared rays The transceiver device 300 misses the count of the number of repetitions of the repetition period LT _{. Therefore, in the specific implementation, the repetition period L T of} the 6-bit Gray code can be set to 64 mm.

In order to illustrate the setting method of the 6-digit Gray code on the tape measure tape 200 in the present invention more clearly, further description is given below through the 6-digit Gray code table shown in Table 1-Table 4 and FIG. 3 and FIG. 4 .

serial number 6 bit Gray code The upper 3 bits correspond to the decimal number The lower 3 bits correspond to the decimal number serial number 6 bit Gray code The upper 3 bits correspond to the decimal number The lower 3 bits correspond to the decimal number 1 000000 0 0 9 001100 1 7 2 000001 0 1 10 001101 1 6 3 000011 0 2 11 001111 1 5 4 000010 0 3 12 001110 1 4 5 000110 0 4 13 001010 1 3 6 000111 0 5 14 001011 1 2 7 000101 0 6 15 001001 1 1 8 000100 0 7 16 001000 1 0

Table 1

serial number 6 bit Gray code The upper 3 bits correspond to the decimal number The lower 3 bits correspond to the decimal number serial number 6 bit Gray code The upper 3 bits correspond to the decimal number The lower 3 bits correspond to the decimal number 17 011000 2 0 25 010100 3 7 18 011001 2 1 26 010101 3 6 19 011011 2 2 27 010111 3 5 20 011010 2 3 28 010110 3 4 twenty one 011110 2 4 29 010010 3 3 twenty two 011111 2 5 30 010011 3 2 twenty three 011101 2 6 31 010001 3 1 twenty four 011100 2 7 32 010000 3 0

Table 2

serial number 6 bit Gray code The upper 3 bits correspond to the decimal number The lower 3 bits correspond to the decimal number serial number 6 bit Gray code The upper 3 bits correspond to the decimal number The lower 3 bits correspond to the decimal number 33 110000 4 0 41 111100 5 7 34 110001 4 1 42 111101 5 6 35 110011 4 2 43 111111 5 5 36 110010 4 3 44 111110 5 4 37 110110 4 4 45 111010 5 3 38 110111 4 5 46 111011 5 2 39 110101 4 6 47 111001 5 1 40 110100 4 7 48 111000 5 0

table 3

serial number 6 bit Gray code The upper 3 bits correspond to the decimal number The lower 3 bits correspond to the decimal number serial number 6 bit Gray code The upper 3 bits correspond to the decimal number The lower 3 bits correspond to the decimal number 49 101000 6 0 57 100100 7 7 50 101001 6 1 58 100101 7 6 51 101011 6 2 59 100111 7 5 52 101010 6 3 60 100110 7 4 53 101110 6 4 61 100010 7 3 54 101111 6 5 62 100011 7 2 55 101101 6 6 63 100001 7 1 56 101100 6 7 64 100000 7 0

Table 4

It can be seen from the 6-bit Gray code table in Table 1-Table 4 that the repetition period of the 6-bit Gray code is 64, and the Gray code with the serial number (M+1) is compared with the Gray code with the serial number M (where 1 ≤M≤63), one and only one digit has changed (from 1 to 0, or from 0 to 1). If the black code is denoted as 0 and the white code is denoted as 1, the above-mentioned 64 6-digit Gray codes are printed from one end of the tape measure tape 200 to the other end in sequence. For example, set the 6-bit Gray code of 000000 with a serial number of 1 at the end of the starting point. Specifically, set the highest bit (ie the sixth bit) 0 in the 6-bit Gray code to the sixth bit Gray code channel 216, and set the second highest bit (ie the sixth bit) The fifth bit) 0 is set to the fifth bit Gray code channel 215, the fourth bit 0 is set to the fourth bit Gray code channel 214, the third bit 0 is set to the third bit Gray code channel 213, and the second lower bit (ie The second bit) 0 is set on the second gray code channel 212, the lowest bit (ie the first bit) 0 is set on the first gray code channel, the height of the above 6 codes is equal to the height of the corresponding gray code channel, The above-mentioned 6 codes are all rectangular bars, and the width of the rectangular bars are all 1mm. In this way, according to the serial numbers shown in Table 1-Table 4, the gray codes are sequentially set on the tape measure tape 200, and the results shown in Figure 3 and Figure 4 can be obtained. The tape measure tape 200 shown. Wherein, as shown in FIG. 3 , the front of the tape measure tape 200 is provided with the first Gray code channel 211 , the second Gray code channel 212 and the third Gray code channel 213 sequentially from top to bottom. The tape measure shown in FIG. 4 The sixth Gray code channel 216 , the fifth Gray code channel 215 and the fourth Gray code channel 214 are arranged on the back of the tape 200 in sequence from top to bottom.

When the front and back of the tape measure tape 200 of the smart tape measure are provided with three Gray code channels 210 from bottom to top, infrared transceivers 300 corresponding to the Gray code channels 210 are also provided, and each infrared The irradiation range of the infrared light emitted by the transceiver device does not exceed the height range of each Gray code channel 210 . Specifically, the first infrared transceiver device is facing the first Gray code channel 211, the second infrared transceiver device is facing the second Gray code channel, and the third infrared transceiver device is facing the third Gray code channel Channel 213, the fourth infrared transceiver is facing the fourth Gray code channel 214, the fifth infrared transceiver is facing the fifth Gray code channel 215, and the sixth infrared transceiver is facing the sixth Gray code Code channel 216. The above six infrared transceivers are respectively connected to corresponding I/O ports in the MCU control chip in the smart tape measure body 100 .

Since three infrared transceivers 300 are provided on both sides of the tape measure 200, if the infrared transceivers on both sides of the tape measure 200 are completely facing each other, the infrared rays emitted by the infrared transceivers 300 on one side of the tape measure tape 200 will transmit through the tape measure When the belt 200 is used, the infrared light receiving result of the infrared transceiver 300 on the other side will be changed, which will affect the measurement result.

In order to ensure the accuracy of the measurement results, the starting point of the Gray code track on the front side of the tape measure 200 needs to be staggered from the starting point of the Gray code track on the back side of the tape measure tape 200 . Because when the tape measure tape 200 is not initially pulled out, the first infrared transceiver is facing the starting point of the first gray code track 211, and the second infrared transceiver is facing the second gray code The starting point of the channel 212, the third infrared transceiver device is facing the starting point of the third Gray code channel 213, the fourth infrared transceiver device is facing the starting point of the fourth Gray code channel 214, and the fifth infrared transceiver device is facing the starting point of the fourth Gray code channel 214. The starting point of the fifth-digit Gray code channel 215 is opposite to the starting point of the sixth-digit Gray code channel 216 by the sixth infrared transceiver. Since the starting point of the Gray code track on both sides of the tape measure tape 200 is misplaced, the first infrared transceiver device, the second infrared transceiver device and the third infrared transceiver device distributed on one side of the tape measure tape 200 are located in the opposite position relative to the distribution The positions of the fourth infrared transceiver, the fifth infrared transceiver and the sixth infrared transceiver on the other side of the tape measure tape 200 are displaced by a certain distance. In a specific implementation, the starting point of the Gray code track on the front side of the tape measure 200 and the start point of the Gray code track on the back side of the tape measure tape 200 are misaligned by a distance of 3-10 mm. Preferably, the starting point of the Gray code track on the front side of the tape measure tape 200 and the start point of the Gray code track on the back side of the tape measure tape 200 are misaligned by a distance of 5.5 mm.

Because black codes and white codes appear on each Gray code channel 210 in a certain period, and white codes and black codes appear alternately. At the same time, the black code and the white code have different absorption rates for the infrared light emitted by the infrared transceiver 300. Specifically, the black code has a high absorption rate of infrared light, and the white code has a low absorption rate of infrared light, which is lower than that of the black code. Absorption rate, the infrared light reflected by the black code is decoded as 0 after being received by the infrared transceiver 300 , and the infrared light reflected back by the white code is received by the infrared transceiver 300 and decoded as 1.

Therefore, when the tape measure tape 200 is being pulled, the infrared transceiver device 300 and the MCU control chip disposed in the smart tape measure body 100 and connected to the infrared transceiver device 300 jointly detect the repeating cycle length when the tape measure tape 200 is being pulled. The number of times n and the offset ΔL in the current repetition period length, and then L=n*L _T +ΔL can calculate the actual measurement length L, which realizes the accurate measurement of the length and reduces the measurement error. Specifically, a black code and a white code with a certain width are set on each Gray code channel of the tape, which effectively avoids the measurement error caused by the deformation of the soft tape being stretched.

Based on the above-mentioned gray code with an intelligent tape measure capable of infrared ranging, the present invention also provides a method for measuring height with a gray code with an intelligent tape measure capable of infrared ranging, as shown in FIG. 5 , comprising the following steps:

Step S100, when detecting that the infrared distance measuring device of the smart tape measure is in an open state, obtain the height reading of the fixed point of the smart tape measure from the ground through the infrared distance measuring device, and detect whether the tape measure is drawn out;

Step S200, when detecting that the tape measure tape is drawn out from the smart tape measure through the tape measure tape outlet, obtain the repetition times of the Gray code with the specified period on the tape measure tape in real time through the infrared transceiver device, and judge whether the tape measure tape is static;

Step S300, when judging that the tape measure is stationary, then obtain the binary number corresponding to the Gray code aligned by the infrared transceiver, and obtain the distance that the tape measure moves in the current cycle of the Gray code according to the Gray code table;

Step S400, obtain the length reading of the current measurement length according to the total width of the Gray code in each cycle, the number of repetitions of the Gray code and the distance moved in the current cycle of the Gray code;

Step S500, when the current measurement mode of the smart tape measure is that the tape measure is pulled out of the measurement mode vertically, then the height is obtained by the difference between the height reading and the length reading;

Step S600 , when the current measurement mode of the smart tape measure is the measurement mode where the tape measure is pulled vertically upwards, the height is obtained through the length of the smart tape measure body, the height reading and the sum of the length readings.

To sum up, in the Gray code smart tape measure with infrared ranging and the height measuring method according to the present invention, an infrared ranging module is also arranged in the smart tape measure body, which can measure the distance exceeding the length of the tape measure tape, and can measure the distance in the smart tape measure. The display on the tape measure displays, and the infrared ranging function is effectively integrated on the smart tape measure.

It should be understood that the application of the present invention is not limited to the above examples. For those of ordinary skill in the art, improvements or transformations can be made according to the above descriptions, and all these improvements and transformations should belong to the protection scope of the appended claims of the present invention.

Claims (8)

1. A gray code tape intelligent tape measure capable of infrared ranging, it is characterized in that, comprises a smart tape measure body, and is arranged in the described smart tape measure body and can be drawn out the tape measure tape, the front and back of the described tape measure tape are all provided with At least one Gray code channel, the Gray code in the Gray code channel is repeatedly set according to a specified period; the intelligent tape measure body is also provided with an infrared transceiver device corresponding to the Gray code channel one-to-one and used for reading the Gray code in the Gray code channel; The smart tape measure body is also provided with an MCU control chip; the smart tape measure body is also provided with a measurement mode that switches the measurement mode of the smart tape measure between the measurement mode of the tape measure being pulled out vertically and the measurement mode of the tape being pulled out vertically downward. The switch button, the smart tape measure body is also provided with an infrared ranging module that is switched on or off; the MCU control chip is electrically connected to the switch button, the infrared ranging module and the infrared transceiver device ; When the outlet of the tape measure is at the top of the smart tape measure body, the infrared ranging module is set at the bottom end of the smart tape measure body, and the tape measure tape is pulled vertically upward. Take out the measuring tape to measure the height, the infrared ranging module emits infrared rays towards the ground to measure the distance to obtain the infrared ranging distance; then pull out the measuring tape to the height level with the top of the human head, and obtain the measuring tape through the infrared transceiver device and the MCU control chip The length that is pulled out; finally, the distance from the top to the bottom of the smart tape measure body is added, and the distance from the infrared distance measurement is added to the length of the tape measure tape pulled out and the distance from the top to the bottom of the smart tape measure body is added. Get the user's height; When the outlet of the tape measure is at the bottom end of the smart tape measure body, the infrared distance measuring module is set at the bottom end of the smart tape measure body, and the tape measure tape is pulled out vertically and downward in the measurement mode to fix the smart tape measure at the specified height from the ground, and to the bottom of the smart tape measure body. Pull out the measuring tape to measure the height, the infrared ranging module emits infrared rays toward the ground to measure the distance, and obtain the infrared ranging distance; then pull out the measuring tape to the height level with the top of the human head, and obtain the measuring tape through the infrared transceiver device and the MCU control chip The length of the belt being pulled out; finally, subtract the length of the tape measure belt being pulled out from the infrared ranging distance, and calculate the difference to get the height of the user. 2 . The Gray code tape smart tape measure capable of infrared ranging according to claim 1 , wherein the smart tape measure body is further provided with a switch device for controlling the infrared transceiver device to be turned on or off, and the switch device It is electrically connected with the infrared transceiver. 3 . The Gray code tape intelligent tape measure capable of infrared ranging according to claim 2 , wherein the front and back surfaces of the tape measure tape are provided with three Gray code channels from bottom to top. 4 . 4. The gray code tape intelligent tape measure capable of infrared ranging according to claim 3, wherein the front of the tape measure tape is provided with low three gray code channels, which are respectively the first gray code channel and the second gray code channel. code channel and the third Gray code channel. 5. The gray code tape smart tape measure capable of infrared ranging according to claim 4, wherein the smart tape measure body is provided with three infrared transceivers on the side facing the front of the tape measure tape, which are respectively the first infrared A transceiver, a second infrared transceiver, and a third infrared transceiver; wherein, the first infrared transceiver is facing the first Gray code channel, and the second infrared transceiver is facing the second Gray code code channel, the third infrared transceiver device is facing the third Gray code channel. 6. The gray code tape intelligent tape measure capable of infrared ranging according to claim 4, wherein the back of the tape measure tape is provided with high three gray code channels, which are respectively the fourth gray code channel and the fifth gray code Road and the sixth Gray Code Road. 7. The gray code tape smart tape measure capable of infrared ranging according to claim 6, wherein the smart tape measure body is provided with three infrared transceivers on the side facing the back of the tape measure tape, which are the fourth infrared transceivers respectively. A transceiver, a fifth infrared transceiver, and a sixth infrared transceiver; wherein the fourth infrared transceiver is facing the fourth Gray code channel, and the fifth infrared transceiver is facing the fifth Gray code channel, the sixth infrared transceiver device is facing the sixth gray code channel. 8. a kind of height measuring method of the gray code belt intelligent tape measure that can measure infrared distance, it is characterized in that, adopt the gray code belt intelligent tape measure that can measure infrared distance in any one of claim 1-7, and this height measuring The method includes the following steps: A. When it is detected that the infrared ranging device of the smart tape measure is turned on, the height reading of the fixed point of the smart tape measure from the ground is obtained through the infrared ranging device, and it is detected whether the tape measure is pulled out; B. When it is detected that the tape measure tape is pulled out from the smart tape measure through the tape measure tape outlet, the number of repetitions of the Gray code with the specified period on the tape measure tape is obtained in real time through the infrared transceiver device, and it is judged whether the tape measure tape is stationary; C. When judging that the tape measure is stationary, then obtain the binary number corresponding to the Gray code aligned by the infrared transceiver, and obtain the distance that the tape measure moves in the current cycle of the Gray code according to the Gray code table; D. Obtain the length reading of the current measurement length according to the total width of the Gray code in each cycle, the number of repetitions of the Gray code and the distance moved in the current cycle of the Gray code; E. When the current measurement mode of the smart tape measure is the measurement mode of the tape measure tape being pulled down vertically, the height is obtained by the difference between the height reading and the length reading; F. When the current measurement mode of the smart tape measure is the measurement mode of the tape measure tape being pulled vertically upwards, the height is obtained by the length of the smart tape measure body, the height reading and the sum of the length readings.